Respiratory complex I
ATP-dependent protease molecule
Succinyl-CoA synthetase enzyme
Oxidoreductase enzyme complex
Succinate dehydrogenase enzyme
DNA gyrase protein segment
Multidrug transporter molecule, illustration
Bacterial nanocompartment
Antibiotic resistance enzyme molecule
Serotonin N-acetyltransferase complex
70S ribosome, molecular model
LAC repressor molecule
Nitrogen-fixing molybdenum iron enzyme
Cytochrome BC1 molecule
cAMP-dependent protein kinase molecule
Simian virus SV40 large T antigen
Flu virus surface protein molecule
Bacterial penicillin-binding protein
Phosphofructokinase bacterial enzyme
Bacterial protease molecule
Marburg viral protein 35 and RNA
Bacterial protein-chaperone complex
Yeast enzyme molecule
Double-stranded RNA-ribonuclease III
Manganese catalase enzyme molecule
Galactoside acetyltransferase molecule
Yeast enzyme, molecular model
Citrate acid cycle enzyme
Pyruvate dehydrogenase complex enzyme
Elongation factors Tu and Ts
Citrate synthase molecule
Elongation factor Tu and tRNA
Src protein molecule
Transcription activator and DNA
Escherichia coli heat-labile enterotoxin
Bacteria circadian clock protein molecule
ATP synthase rotor ring
SV40 antigen and tumor suppressor
Anthrax oedema factor molecule
Multidrug transporter molecule
MscS ion channel protein structure
Urea channel molecule
Isocitrate dehydrogenase kinase
FecA transmembrane channel
Lumazine synthase molecule
Bacterial regulator-DNA complex
Methane monooxygenase enzyme
Light-harvesting protein complex
Herpesvirus surface protein molecule
Fungal prion protein
Dengue virus surface protein molecule
Rift Valley Fever virus, molecular model
KSHV virus capsid, molecular model
Human polio virus, molecular model
Ribosomal RNA-binding protein molecule
Heterotrimeric G protein complex molecule
Heterotrimeric G protein molecule
Transcription activation of IFN-beta gene
Transcription factor bound to DNA
Myoglobin molecule
Phosphoglycolate phosphatase, illustration
Glutamate transporter protein
Human electron transfer flavoprotein
Mutant insulin, molecular model
Beta-lactamase molecule, illustration
Mandelate racemase molecules, illustration
Hexokinase sugar enzyme
Proteinase inhibitor molecule
PolyA polymerase, molecular model
HGPRTase molecule
Chitinase enzyme molecule
Lysozyme complexed with antibody
DNA transcription, molecular model
Amylase, molecular model
Uricase enzyme, molecular model
Scavenger mRNA-decapping enzyme
Carbonic anhydrase molecule
Hydroxysteroid dehydrogenase molecule
Bioluminescent enzyme molecule
Cytochrome P450 and erythromycin
Lysozyme molecule
RNA exosome complex, molecular model
PolyA polymerase and RNA
Family 84 glycoside hydrolase molecule
RNA interference molecules
DNA and MECP2 complex, molecular model
mRNA capping apparatus
Glycosylation enzyme molecule
DNA repair enzyme, molecular model
Iron-regulatory protein bound to RNA
Human lysine-specific demethylase
Methionine aminopeptidase molecule
Ribonuclease A molecule
Alcohol dehydrogenase molecule
Human RNA exosome complex, molecular mode
Bovine coronavirus enzyme
NpmA methyltransferase
Dienoyl-coenzyme A isomerase molecule
Cyclin-dependent kinase inhibitor complex
Dynamin enzyme, molecular model
Espirito santo virus, molecular model
Herpes simplex virus, molecular model
Adeno-associated virus, molecular model
Astrovirus capsid, molecular model
Polyomarvirus capsid, molecular model
Circadian clock molecule, illustration
Circadian clock molecule, molecular model
Kaposi's sarcoma virus, illustration
DyP-type peroxidase, illustration
NAD-dependent DNA ligase molecule
Catalase, molecular model
RNA polymerase holoenzyme
Bacterial manganese catalase molecule
Bacterial rhomboid protease GlpG
Ribonuclease III complex
Beta-glucosidase molecule
E. coli DNA mismatch repair complex
Lambda repressor-operator complex
H-NS chromatin-structuring protein
Chaperonin folding protein
Adenovirus fibre shaft protein
Cytochrome b6f complex, molecular model
Toll-like receptor 3 and RNA
Purple bacterium photosynthesis centre